Aleo mining revenue fluctuates mainly due to two factors:

The primary reason is the reward distribution mechanism of the Aleo network. In each block, rewards are distributed to multiple qualified miners based on a complex weighting calculation. As a result, the earnings of the same miner may vary significantly between different blocks.

Another reason is the payout method. Over different time periods, miners' earnings may fluctuate considerably because Aleo adopts the PPLNS payout model, where rewards are only generated when a block is successfully mined. However, in the long run, mining revenues under the PPLNS and PPS payout models tend to be similar.